Polarization switching in a columnar liquid crystalline urea as studied by optical second-harmonic generation interferometry
Polarization switching in a columnar liquid crystalline urea as studied by optical second-harmonic generation interferometry
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DOI：
10.1103/physreve.72.020701
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发表时间：
2005-08-01
影响因子：
2.4
通讯作者：
Takezoe, H
中科院分区：
文献类型：
--
作者：
Okada, Y;Matsumoto, S;Takezoe, H
用光学二次谐波干涉法研究了N，N-′-双（3，4，5-三烷基苯基）脲（R= n-C_（16）H_（33））通过分子间氢键连接形成柱状液晶相的极性序及其开关特性。极性结构通过施加电场而沿着柱形成，并且通过反转电场而协同切换。通过终止场，极性序在几毫秒内放松到非极性状态。在没有场的情况下，至少在可见光波长范围内不存在宏观极序。
The polar order and its switching characteristics have been investigated by means of optical second-harmonic generation interferometry in a compound N,N-'-bis(3,4,5-trialkoxylphenyl)urea (R=n-C16H33) being connected by intermolecular hydrogen bondings to form a columnar liquid crystalline phase. The polar structure is formed along the column by applying an electric field and is cooperatively switched by reversing the field. The polar order is relaxed to a nonpolar state within a few milliseconds by terminating the field. No macroscopic polar order exists at least in a range of a visible wavelength scale in the absence of a field.